A source said: “Sally really wanted to go with him and was disappointed she couldn’t – but it made no sense.

Ronnie and wife Sally Humphreys (Image: Getty)

“It’s a full-on tour with a lot of travel involved. Her pregnancy comes first, so the decision was made some time ago. But now it’s a blessing. The Zika virus alone would have been a huge risk and they both recognised that.

“Also a lot of places on the tour are not that safe, even though the band have a great security team with them.”

The twins will be the couple's first children together, while Ronnie has four children from previous relationships.